5 M ar 2 00 7 Excitation of zonal flow by the modulational instability in electron temperature gradient driven turbulence February 2 , 2008
نویسندگان
چکیده
The generation of large-scale zonal flows by small-scale electrostatic drift waves in electron temperature gradient(ETG) driven turbulence model is considered. The generation mechanism is based on the modulational instability of a finite amplitude monochromatic drift wave. The threshold and growth rate of the instability as well as the optimal spatial scale of zonal flow are obtained.
منابع مشابه
ar X iv : p hy si cs / 0 70 30 50 v 1 5 M ar 2 00 7 Excitation of zonal flow by the modulational instability in electron temperature gradient driven turbulence March 6 , 2007
The generation of large-scale zonal flows by small-scale electrostatic drift waves in electron temperature gradient(ETG) driven turbulence model is considered. The generation mechanism is based on the modulational instability of a finite amplitude monochromatic drift wave. The threshold and growth rate of the instability as well as the optimal spatial scale of zonal flow are obtained.
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